What is the method used in the Isometric Abdominal Endurance Test?

The Isometric Abdominal Endurance Test measures the endurance of the abdominal muscles, specifically assessing how well they can maintain a static contraction over time. In this test, the patient is instructed to lift and hold their scapulae off the table while keeping their knees bent and feet flat on the surface. This position is crucial because it isolates the abdominal muscles and reduces the contribution of the hip flexors, ensuring that the test accurately reflects the endurance capacity of the core muscles.

Maintaining the lifted position places continuous isometric tension on the abdominal muscles, which is necessary for evaluating endurance. This differs from other options, such as holding a plank or position involving leg raises, which would engage different muscle groups or incorporate dynamic movements rather than focusing solely on abdominal endurance. Thus, option C is the method that directly aligns with the purpose of this specific test by effectively isolating and challenging the endurance of the abdominal muscles.